WO2008010788A2 - Compositions and methods for making and using nanoemulsions - Google Patents
Compositions and methods for making and using nanoemulsions Download PDFInfo
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- WO2008010788A2 WO2008010788A2 PCT/US2006/026918 US2006026918W WO2008010788A2 WO 2008010788 A2 WO2008010788 A2 WO 2008010788A2 US 2006026918 W US2006026918 W US 2006026918W WO 2008010788 A2 WO2008010788 A2 WO 2008010788A2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
- A61K9/1075—Microemulsions or submicron emulsions; Preconcentrates or solids thereof; Micelles, e.g. made of phospholipids or block copolymers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
- A61K9/113—Multiple emulsions, e.g. oil-in-water-in-oil
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/06—Antihyperlipidemics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/41—Emulsifying
- B01F23/413—Homogenising a raw emulsion or making monodisperse or fine emulsions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/70—Nanostructure
- Y10S977/773—Nanoparticle, i.e. structure having three dimensions of 100 nm or less
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/902—Specified use of nanostructure
- Y10S977/904—Specified use of nanostructure for medical, immunological, body treatment, or diagnosis
- Y10S977/906—Drug delivery
Definitions
- the present invention relates to the field of nanoemulsions.
- nanoemulsions are made using high shear stress technology.
- the invention comprises uniform microfluidized nanoemulsions.
- the uniform nanoemulsion comprises a compound such as a pharmaceutical, nutraceutical, or cosmeceutical.
- the uniform nanoemulsion comprises improved pharmacokinetic parameters when compared to conventional nanoparticulate compositions and/or nanoemulsions.
- the present invention contemplates a method of making a bacteria-resistant nanoemulsion.
- Micro/nanoemulsion technology has substantial commercial value. In relation to the nutraceutical area alone, the market value is estimated as a 250 billion dollar business world-wide. Consequently, the ability to incorporate lipid soluble nutraceuticals into beverages (the fastest-growing component of the food industry) as well as low or no fat foods is of important interest.
- nanoemulsions that: i) has improved temperature and pH stability; ii) improved bioavailability; and iii) improved shelf-life due to microbial resistance, hi addition, nanoemulsions should be relatively easy and inexpensive to prepare.
- the present invention relates to the field of nanoemulsions.
- the nanoemulsion is made using a high shear stress technology.
- the invention comprises uniform microfluidized nanoemulsions.
- the uniform nanoemulsion comprises a compound such as a pharmaceutical, nutraceutical, or cosmeceutical.
- the uniform nanoemulsion comprises improved pharmacokinetic parameters when compared to conventional nanoparticulate compositions and/or nanoemulsions.
- the present invention contemplates a method of making a bacteria-resistant nanoemulsion.
- the present invention contemplates a nanoemulsion comprising a population of particles having maximum and minimum diameters, wherein the difference between said maximum and minimum diameters does not exceed 100 nm.
- the present invention contemplates a nanoemulsion comprising a population of particles having diameters between approximately 10 and approximately 110 nanometers, wherein said nanoemulsion is not contaminated by particles having diameters larger than 110 nanometers.
- the particles encapsulate a compound.
- the compound is a pharmaceutical.
- the compound is a nutraceutical.
- the present invention contemplates a nanoemulsion comprising a first and second population of particles, wherein the majority of particles in said first population have diameters between approximately 10 and approximately 20 nanometers, wherein the majority of particles in said second population have diameters between approximately 40 and approximately 80 nanometers, wherein said nanoemulsion is uncontaminated by particles having diameters larger than 110 nanometers.
- the particles encapsulate a compound, hi one embodiment, the compound is a pharmaceutical.
- the compound is a nutraceutical.
- a nanoemulsion comprising a population of particles having diameters between approximately 50 and approximately 150 nanometers, wherein said nanoemulsion is not contaminated by particles having diameters larger than 160 nanometers.
- the particles encapsulate a compound.
- the compound is a pharmaceutical.
- the compound is a nutraceutical.
- the present invention contemplates a method, comprising: a) providing; i) a premix comprising a compound and a liquid dispersion medium, wherein said compound has a solubility greater than 30 mg/ml in said medium; and ii) a microfluidizer capable of maintaining at least 25,000 PSI; b) using a single pass exposure of said premix to said microfluidizer to create a population of nanoemulsion particles having diameters ranging approximately between 10 -110 run.
- the dispersion medium is selected from the group consisting of aqueous media and oil-based media.
- the aqueous media is selected from the group consisting ot water, ringers solution, dextrose, and short chain alcohols.
- the oil- based media is selected from the group including, but not limited to, saturated and unsaturated oils from vegetable and marine sources, silicone oils, mineral oils, and plant- derived oils.
- the compound is selected from the group including, but not limited to, a plant sterol, cod liver oil, tocopherol, lecithin, lutein, zeaxanthin, and soy protein.
- the present invention contemplates a method, comprising: a) providing; i) a heated dispersion medium; ii) a compound having substantial solubility in said medium; and iii) a micro fluidizer capable of making a uniform nanoemulsion from said medium; b) adding said compound to said medium at a temperature of at least 70 0 C to create a premix; and c) micro fluidizing said premix at a pressure of at least 25,000 PSI to create said nanoemulsion having particle diameters ranging between 10 - 110 nm.
- said dispersion medium is selected from the group consisting of soybean oil and water.
- said dispersion medium is heated 1 to at least 65°C.
- said compound may be selected from the group comprising a plant sterol, cod liver oil, tocopherol, lecithin, lutein, zeaxanthin, Iycopene, whey protein, and soy protein.
- the nanoemulsion encapsulates the compound.
- 86% of said particle diameters have a 54 nm average diameter.
- 14% of said particles diameters have a 16 nm average diameter.
- 82% of said particle diameters have a 64 nm average diameter.
- 17% of said particle diameters have a 19 nm average diameter.
- 78 % of said particle diameters have a 88 nm average diameter.
- 22% of said particle diameters have a 27 nm average diameter
- hi one embodiment, 84% of said particle diameters have a 90 nm average diameter.
- 16% of said particle diameters have a 23 nm average diameter
- hi one embodiment, 80% of said particle diameters have a 55 nm average diameter.
- the present invention contemplates a method, comprising: a) providing; i) a premix comprising a compound, a first antioxidant, a second antioxidant, and an aqueous dispersion medium, wherein said compound has a solubility greater than 30 mg/ml in said medium; and iii) a microfluidizer capable of maintaining at least 25,000 PSl; c) using a single pass exposure ot said premix to said microlluidizer to create a population of nanoemulsion particles having diameters ranging from between approximately 40 - 110 nm, wherein said particle diameter remains stable for at least four months.
- the method further comprises pasteurizing said population of nanoemulsion particles wherein said particle diameters remain stable.
- the method further comprises freezing said population of nanoemulsion particles wherein said particle diameters remain stable.
- the present invention contemplates a method, comprising: a) providing; i) a stable aqueous dispersion medium comprising a first antioxidant; ii) a solution comprising natural emulsif ⁇ ers; ii) a compound having substantial solubility in said medium comprising a second antioxidant; and iii) a microfluidizer capable of making a uniform nanoemulsion from said medium; b) adding said compound and said solution to said medium and heating to a temperature of at least 5O 0 C to create a premix; and c) micro fluidizing said premix at a pressure of at least 25,000 PSI to create said nanoemulsion having particle diameters ranging between 40 - 110 nm wherein said particle diameter remains stable for at least four months.
- the nanoemulsion encapsulates the compound.
- the method further comprises pasteurizing said nanoemulsion wherein said particle diameters remain stable.
- the method further comprises freezing said nanoemulsion wherein said particle diameters remain stable.
- said solution comprises milk.
- said compound comprises DHA fish oil.
- said pasteurization comprises exposing said nanoemulsions to 75 0 C for thirty seconds.
- said freezing comprises exposing said nanoemulsions to - 4°C for 24 hours.
- the present invention contemplates a method, comprising; a) providing; i) a subject refractory to an administered compound at a therapeutically effective amount; ii) a nanoemulsion comprising a population of particles encapsulating said compound, wherein said particles having diameters between approximately 10 and approximately 110 nanometers, wherein said nanoemulsion is not contaminated by particles having diameters larger than 110 nanometers; b) delivering said nanoemulsion to said patients under conditions such that said compound bioavailability is improved and wherein said compound is therapeutically effective.
- the improved bioavailability comprises pharmacokinetic parameters selected irom tne group consisting of decreased T max , increased C max , and increased AUC.
- the delivering comprises a method selected from the group consisting of oral, transdermal, intravenous, intraperitoneal, intramuscular, and subcutaneous.
- the nanoemulsion comprises a plant sterol. In one embodiment, the nanoemulsion comprises lycopene.
- the present invention contemplates a method for improving a nanoemulsion bioavailability comprising providing a uniform microfluidized nanoemulsion and delivering the uniform nanoemulsion to a subject.
- the subject comprises a mammal.
- the nanoemulsion encapsulates a compound.
- the nanoemulsion is delivered by oral administration.
- the nanoemulsion is delivered by methods including, but not limited to, transdermally, intravenously, intraperitoneally, intramuscularly or subcutaneously.
- said improved bioavailability comprises pharmacokinetic parameters selected from the group consisting of decreased T max , increased C ma ⁇ , and increased AUC.
- said nanoemulsion is formulated for oral administration.
- said nanoemulsion comprises a plant sterol.
- said nanoemulsion comprises lycopene.
- the present invention contemplates a nanoemulsion having bacteria-resistant properties, wherein said nanoemulsion comprises a population of particles encapsulating said compound, wherein said particles having diameters between approximately 10 and approximately 110 nanometers, wherein said nanoemulsion is not contaminated by particles having diameters larger than 110 nanometers.
- the nanoemulsion resists bacterial growth for at least three months.
- the bacterial-resistant properties comprise shear-force induced cell lysis.
- the bacterial-resistant properties comprise an oxidizing environment.
- the nanoemulsion is sterile.
- the present invention contemplates a uniform microfluidized nanoemulsion comprising bacteria-resistant properties.
- said nanoemulsion resists bacterial growth for at least three months.
- the nanoemulsion comprises particles having a diameter distribution of between 10 - 110 nm.
- said bacterial-resistant properties compose shear-iorce induced cell lysis.
- the nanoemulsion is sterile.
- the present invention contemplates a method, comprising: a) providing; i) a premix comprising a compound and a liquid dispersion medium; and ii). a device capable of creating a continuous turbulent flow under high pressure; b) using said device to create a population of nanoemulsion particles having uniform diameter.
- the dispersion medium is selected from the group consisting of aqueous media and oil-based media.
- the aqueous media is selected from the group consisting of water, saline solution, ringers solution, dextrose, and short chain alcohols.
- the oil-based media is selected from the group consisting of saturated and unsaturated oils from vegetable and marine sources, silicone oils, and mineral oils.
- the compound is selected from the group consisting of a plant sterol, cod liver oil, tocopherol, lecithin, lutein, zeaxanthin, and soy protein.
- microfluidized refers to an instrument or a process that utilizes a continuous turbulent flow at high pressure including, but not limited to, a microfluidizer or other like device that may be useful in creating a uniform nanoemulsion.
- microfluidizing may create a uniform nanoemulsion comprising a pharmaceutical, nutraceutical, or cosmeceutical from a premix within a thirty (30) second time frame (typically referred to a single pass exposure).
- a microfluidizer may be operated at a pressure of approximately 25,000 PSI to generate a uniform nanoemulsion.
- uniform nanoemulsion refers to any emulsion comprising any specified range of particle diameter sizes wherein the difference between the minimum diameter and maximum diameters do not exceed approximately 600 nm, preferably approximately 300 nm, more preferably approximately 200 nm, but most preferably approximately 100 nm (i.e., for example, microfluidization, as contemplated herein, produces a uniform nanoemulsion having a range of approximately 10 - 110 nm and is referred to herein as a uniform microfluidized nanoemulsion).
- the total particle distribution i.e., 100%
- a particle diameter distribution where less than 3% is outside the specified range of particle diameter sizes is still contemplated herein as a uniform nanoemulsion.
- population refers to any mixture of nanoemulsion particles having a distribution in diameter size.
- a population of nanoemulsion particles may range is particle diameter from between approximately 10 - l lO nm.
- nanoparticle refers to any particle having a diameter of less than 300 nanometers (nm), as defined by the National Science Foundation or preferably less than 100 nm, as defined by the National Institutes of Health. Most conventional techniques create nanoparticle compositions with an average particle diameter of approximately 300 nanometers (nm) or greater.
- Oil-based liquids may include, but not limited to; saturated and unsaturated oils from vegetable and marine sources including, but not limited to, soybeans, safflowers, olives, corn, cottonseeds, linseed, safflower, palm, peanuts, flaxseeds, sunflowers, rice bran, sesame, rapeseed, cocoa butter etc., and mixtures thereof; silicone oils; and mineral oils.
- aqueous media may include, but are not limited to, water, saline solutions, short chain alcohols, 5% dextrose, Ringer's solutions (lactated Ringer's injection, lactated Ringer's plus 5% dextrose injection, acylated Ringer's injection), Normosol-M, Isolyte E, and the like; and synthetic and/or natural detergents having high surfactant properties, deoxycholates, cyclodextrins, chaotropic salts and ion pairing agents etc., and mixtures thereof.
- compound refers to any pharmaceutical, nutraceutical, or cosmeceutical (i.e., for example, organic chemicals, lipids, proteins, oils, vitamins, crystals, minerals etc.) that are substantially soluble in a dispersion medium.
- substantially soluble refers to any compound that dissolves into a dispersion medium to a concentration greater than 30 mg/ml. Preferably, the dispersion medium is heated while the compound is being dissolved.
- premixe refers to any mixture that is subsequently used to generate a nanoparticulate composition or a uniform microfluidized nanoemulsion.
- premixes typically contain a liquid dispersion medium and a compound, and optionally, an emulsifier and/or an antioxidant.
- stable refers to any population of nanoemulsion particles whose diameters stay within the range of approximately 10 - 110 nm over a prolonged period of time (i.e., for example, one (1) day to twenty-four (24) months, preferably, two (2) weeks to twelve (12) months, but more preferably two (2) months to five (5) months). For example, if a population of nanoemulsion particles is subjected to prolonged storage, temperature changes, and/or pH changes whose diameters stay within a range of between approximately 10 - 110 nm, the nanoemulsion is stable.
- bacteria-resistant refers to the lack of observable bacterial growth.
- sterile refers to a nanoemulsion that contains no living bacterial cells.
- pharmaceutically acceptable refers to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.
- pharmaceutically acceptable salts refers to derivatives wherein the parent compound is modified by making acid or base salts thereof.
- pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic residues such as amines; alkali or organic salts of acidic residues such as carboxylic acids; and the like.
- the pharmaceutically acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids.
- such conventional non-toxic salts include those derived from inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, nitric, and the like; and the salts prepared from organic acids such as acetic, propionic, succinic, glycolic, stearic, lactic, malic, tartaric, citric, ascorbic, pamoic, maleic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, sulfanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic, methanesulfonic, ethane disulfonic, oxalic, isethionic, and the like.
- inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, nitric, and the like
- organic acids such as acetic, propionic, succinic, glycolic, stearic,
- terapéuticaally effective amount as used herein, with respect to a drug dosage, shall mean that dosage that provides the specific pharmacological response for which the drug is administered or delivered to a significant number of subjects in need of such treatment. It is emphasized that 'therapeutically effective amount/ administered to a particular subject in a particular instance will not always be effective in treating the diseases described herein, even though such dosage is deemed a "therapeutically effective amount” by those skilled in the art. Specific subjects may, in fact, be “refractory” to a “therapeutically effective amount”. For example, a refractory subject may have a low bioavailability such that clinical efficacy is not obtainable. It is to be further understood that drug dosages are, in particular instances, measured as oral dosages, or with reference to drug levels as measured in blood.
- refractory refers to any subject that does not respond with an expected clinical efficacy following the delivery of a compound as normally observed by practicing medical personnel.
- delivering or “administering” as used herein, refers to any route for providing a pharmaceutical or a nutraceutical to a subject as accepted as standard by the medical community.
- the present invention contemplates routes of delivering or administering that include, but are not limited to, oral, transdermal, intravenous, intraperitoneal, intramuscular, or subcutaneous.
- subject refers to any animal to which an embodiment of the present invention may be delivered or administered.
- a subject may be a human, dog, cat, cow, pig, horse, mouse, rat, gerbil, hamster etc.
- encapsulate refers to any compound that is completely surrounded by a protective material.
- a compound may become encapsulated by a population of nanoemulsion particle formation during microfluidization.
- pharmaceutical refers to any compound added to a dietary source (i.e., for example, a fortified food or a dietary supplement) that provides health or medical benefits in addition to its basic nutritional value.
- compositions including, but not limited to, a cream, oil, foam, spray, liquid etc.
- Cosmeceuticals may include categories such as, but not limited to, carotenoids, phenolic compounds, or water soluble antioxidants.
- Figure 1 presents exemplary data showing the particle diameter distribution of a microfluidized plant sterol nanoemulsion population three (3) months after preparation.
- Figure IA presents exemplary data showing the particle diameter distribution of a microfluidized plant sterol nanoemulsion three (3) months after preparation.
- Figure 2 presents exemplary data showing the particle diameter distribution of a microfluidized cod liver oil nanoemulsion population four (4) months after preparation.
- Figure 3 presents exemplary data showing the particle diameter distribution of a microfluidized tocopherol nanoemulsion population five (5) months after preparation.
- Figure 4 presents exemplary data showing the particle diameter distribution of a microfluidized lutein/zeaxanthin nanoemulsion population.
- Figure 5 presents exemplary data showing the particle diameter distribution of a microfluidized soy protein nanoemulsion population.
- Figure 6 presents exemplary data showing the particle diameter distribution of a microfluidized whey protein nanoemulsion population.
- Figure 7 presents exemplary data showing the particle diameter distribution of a microfluidized orange juice/plant sterol/lutein nanoemulsion population.
- Figure 8 presents exemplary data showing the particle diameter distribution of a microfluidized DHA fish oil/water nanoemulsion population two (2) months after preparation.
- Figure 9 presents exemplary data showing the particle diameter distribution of a microfluidized DHA fish oil/milk nanoemulsion population three (3) weeks after preparation.
- Figure 10 presents exemplary data showing the particle diameter distribution of a microfluidized DHA fish oil/milk/tocopherol nanoemulsion population.
- Figure 11 presents exemplary data showing the particle diameter distribution of a microfluidized DHA fish oil/milk/tocopherol nanoemulsion population after pasteurization.
- Figure 12 presents exemplary data showing the particle diameter distribution of a microfluidized DHA fish oil/milk/tocopherol nanoemulsion population after a freeze- thaw process.
- Figure 13 presents exemplary data of gerbil plasma lycopene levels when fed a lycopene-enriched diet.
- Figure 14 presents exemplary data of gerbil plasma lycopene levels when fed a microfluidized lycopene nanoemulsion diet.
- Figure 15 presents one embodiment of an anti-bacterial property generated during the preparation of a microfluidized plant sterol nanoemulsion.
- Figure 16 presents exemplary data showing the particle diameter distribution of a microfluidized plant sterol nanoemulsion population used in Example 12.
- Figure 17 presents exemplary data showing that a microfluidized plant sterol nanoemulsion diet is more effective in reducing plasma LDL-C in hypercholesterolemic hamsters than either a micronized plant sterol diet or a crystalline plant sterol diet for four (4) weeks.
- Figure 18 presents exemplary data comparing premix cholesterol particle diameter distributions from: Panel A: Tween ® 80/Water as per the ' 118 patent; and Panel B: Oil/Lecithin/Tween ® 80/Water as contemplated by one embodiment of the present invention.
- Figure 19 presents exemplary data comparing microfluidized cholesterol nanoemulsion particle diameter distributions from: Panel A: Tween ® 80/Water as per the ' 118 patent using repeated microfluidization passes; and Panel B: Oil/Lecithin/Tween ® 80/Water as contemplated by one embodiment of the present invention using a single microfluidization pass.
- Figure 20 presents exemplary data comparing microfluidized cholesterol nanoemulsion particle diameter distributions from: Panel A: Tween ® 80/Water as per the '118 patent using a single pass exposure; and Panel B: Oil/Lecithin/Tween ® 80/Water as contemplated by one embodiment of the present invention using a single pass exposure.
- the present invention relates to the field of nano emulsions.
- the nanoemulsion is created by a high shear stress technology.
- the invention comprises uniform microfluidized nanoemulsions.
- the uniform nanoemulsion comprises a compound such as a pharmaceutical, nutraceutical, or cosmeceutical.
- the uniform nanoemulsion comprises improved pharmacokinetic parameters when compared to conventional nanoparticulate compositions and/or nanoemulsions.
- the present invention contemplates a method of making a bacteria-resistant nanoemulsion.
- Nanoemulsion nutraceutical delivery is generally directed to pharmaceuticals.
- Nanoemulsion nutraceutical delivery has received little attention.
- one nanoemulsion system contains plant sterols.
- Bruce et al. "Method for producing dispersible sterol and stanol compounds" US Pat. No. 6,387,411 (2002)(herein incorporated by reference).
- This technology uses a grinding method to produce the nanoemulsions, and consequently, the particle diameter is at least six (6) times greater than contemplated herein.
- this diameter difference offers particular advantages in stability and efficacy (infra).
- the '411 patent does not disclose the incorporation of absorbable micronutrients.
- Cosmeceuticals may comprise, for example; carotenoids including, but not limited to, ⁇ -carotene, ⁇ -carotene, ⁇ -cryptoxanthin, lycopene, crocetin, fucoxanthin, halocynthiaxanthin, canthaxanthin, astraxanthin, lutein, or zeaxanthin; phenolic compounds including, but not limited to, quercetin, rutin, myricetin, kaemferol, catechin, epigallocatechin, epicatechin, reservatrol, tocopherol, ferulate, ubiquinol-10, soy isoflavones such as genestein, daidzein, alpha lipoic acid, anthocyanins, ellagic tannins, gallic or ellagic acids; or water soluble anti-oxidants such as ascorbic acid,
- the present invention is directed to populations of nanoparticles or nanoemulsions comprising an oral delivery vehicle for all absorbable (i.e., for example, fat-soluble) nutrients including, but not limited to, fatty acids, carotenoids, tocopherols, tocotrienols, and coenzyme-Q. Delivery methods, however, are not limited to oral and include, but are not limited to, transdermal, intravenous, intraperitoneal, intramuscular, or subcutaneous.
- the carotenoids include, but are not limited to, lutein and zeaxanthin.
- the present invention is also directed to populations of nanoparticles or nanoemulsions comprising an oral delivery vehicle for all nonabsorbable (i.e., for example, fat soluble) plant sterol compounds including, but not limited to, phytosterols and phytostanols.
- the compounds are encapsulated by the nanoparticles or nanoemulsions.
- common emulsifying agents are used to prepare the nanoemulsions.
- the emulsifying agents include, but are not limited to, phospholipids, fatty acid monoglycerides, fatty acid diglycerides, or polysorbates.
- the present invention also contemplates that certain nanoemulsion embodiments .of the present invention comprise a surface-to-volume ratio that results in an improved bioavailability over current methods and compositions known in the art.
- the present invention also contemplates that certain nanoemulsion embodiments of the present invention are resistant to microbiological growth. Although it is not necessary to understand the mechanism of an invention, it is believed that the microfluidization process comprises a high sheer stress and/or creates an oxidizing environment, thereby disrupting microbial integrity and/or preventing microbial growth. I. Methods Of Making Nanoemulsions
- Nanoemulsions have been generated by a variety of methods, hi particular, these methods provide a wide variation in particle diameter and require organic solvents and or polymers. When these known nanoemulsions are considered for an oral drug or nutrient delivery system, issues of biocompatibility and physiological side effects become an important issue.
- the present invention contemplates a method of making a nanoemulsion comprising a continuous turbulent flow at high pressure.
- the high pressure turbulent flow comprises microfluidization.
- a uniform nanoemulsion is generated from a premix using a single pass exposure (i.e., for example, within a thirty (30) second time frame).
- the uniform nanoemulsion comprises a population of particles whose difference between the minimum and maximum diameters does not exceed approximately 100 nm.
- a uniform nanoemulsion is generated using a pressure of at least 25,000 PSI.
- the present invention contemplates a method of making uniform microfluidized nanoemulsions without organic solvents or polymers.
- the microfluidized nanoemulsion is made from a suspension. In another embodiment, the microfluidized nanoemulsion is made from a microemulsion. In one embodiment, the present invention contemplates a uniform microfluidized nanoemulsion using compounds that are substantially soluble in a liquid dispersion medium. In one embodiment, the nanoemulsion encapsulated the compounds, hi one embodiment, the compounds comprise pharmaceuticals and/or nutraceuticals.
- nutraceuticals and dietary supplements are disclosed, for example, in Roberts et al., Nutriceuticals: The Complete Encyclopedia of Supplements, Herbs, Vitamins, and Healing Foods (American Nutriceutical Association, 2001), which is specifically incorporated by reference. Dietary supplements and nutraceuticals are also disclosed in Physicians' Desk Reference for Nutritional Supplements, 1st Ed. (2001) and The Physicians' Desk Reference for Herbal Medicines, 1st Ed. (2001), both of which are also incorporated by reference.
- a nutraceutical or dietary supplement, also known as a phytochemical or functional food is generally any one of a class of dietary supplements, vitamins, minerals, herbs, or healing foods that have medical or biological effects on the body.
- nutraceuticals or dietary supplements include, but are not limited to, lutein, folic acid, fatty acids (e.g., DHA and ARA), fruit and vegetable extracts, vitamin and mineral supplements, phosphatidylserine, lipoic acid, melatonin, glucosamine/chondroitin, Aloe Vera, Guggul, amino acids (e.g., glutamine, arginine, iso- leucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine), green tea, lycopene, whole foods, food additives, herbs, phytonutrients, antioxidants, flavonoid constituents of fruits, evening primrose oil, flax seeds, fish and marine animal oils, and probiotics.
- amino acids e.g., glutamine, arginine, iso- leucine, leucine, lysine, methionine, phenylalanine, th
- Nutraceuticals and dietary supplements also include bio-engineered foods genetically engineered to have a desired property, also known as "pharmafoods.”
- these compounds include, but are not limited to, naturally occurring oils, fatty acids, and proteins.
- a naturally occurring oil comprises fish oil (i.e., for example, cod liver oil).
- a naturally occurring fatty acid comprises an omega-3 (i.e., for example, DHA).
- the nanoemulsion comprises little or no fat.
- a naturally occurring protein comprises soy or whey.
- the present invention contemplates a method of making a uniform micro fluidized nanoemulsion comprising a population of particles whose diameter ranges from between 10 - 110 nm.
- Microfluidization is a unique process that powers a single acting intensif ⁇ er pump.
- the intensifier pump amplifies the hydraulic pressure to the selected level which, in turn, imparts that pressure to the product stream.
- the intensifier pump As the pump travels through its pressure stroke, it drives the product at constant pressure through the interaction chamber. Within the interaction chamber are specially designed fixed-geometry microchannels through which the product stream will accelerate to high velocities, creating high shear and impact forces that generates a uniform nanoemulsion as the high velocity product stream impinges on itself and on wear-resistant surfaces.
- the intensifier pump completes its pressure stroke, it reverses direction and draws in a new volume of product. At the end of the intake stroke, it again reverses direction and drives the product at constant pressures, thereby repeating the process.
- this previous process requires long-processing times (i.e., repeated microemulsifying cycles) thereby promoting heat build-up in the micro fluidizer. Consequently, this early technique requires processing temperatures of less than 40°C.
- This technique resulted in average nanoemulsion particle diameters of approximately 300 nm.
- lower particle diameters i.e., less than 100 nm
- Exemplary data presented herein has used the Bosch et al. process to produce a complete particle diameter distribution profile. See Example 13. These data show that the Bosch et al. technology cannot produce a uniform nanoemulsion as contemplated by the present invention.
- Cooper et al. defines a "poorly water-soluble" drug as having a solubility of less than about 30 mg/ml.
- plant sterol nanoparticulate compositions comprising one or more sterols or stanols (i.e., sitosterol or phytosterols) are suggested in the art as having a particle diameter of less than 50 nm.
- Cooper et al. does not use a micro fluidizer nor present any data showing a capability of providing a uniform particle diameter ranging between 10 - 110 nm. Instead, Cooper et al. relies upon a more traditional milling process that does not produce a uniform particle diameter distribution ranging between 10 - 110 nm.
- DYNO ® -MILL KDL milling grinder
- This equipment is currently marketed in the United States by Glen Mills, Inc. (Clifton, NJ) and advertises with the following technical information.
- the DYNO ® - MILL is a versatile horizontal bead mill having applications ranging from paints and coatings to drug manufacturing and cell disruption for extracting proteins. Grinding to a mean diameter of 320 nm has been reported in research papers. Operation of the DYNO ⁇ -MILL is always wet, that is, the material to be ground is held in suspension in any suitable liquid.
- a jacketed grinding chamber contains a series of agitators that are equally spaced along the length of a central shaft.
- the jacket on the grinding chamber is used to control the temperature of the material being processed.
- the chamber is secured at one end and cantilevers out over the shaft.
- the bearing end contains a separator gap which has clearance tolerances that can be set as tight as 20 microns.
- the chamber is filled to about 80% of its capacity with beads (i.e., PolyMill ® 500; 500 ⁇ m diameter grinding beads). Depending on the specific application beads made from glass, ceramic, metals, tungsten carbide and other materials are available.
- the process material is now introduced into the chamber. When the chamber is full of material and beads, the machine is switched on and the agitator discs rotate forcing the beads to impact over and over with the process material with hurricane-like force. This action of having thousands of separate impacts produces rapid and consistent size reduction.
- Cooper et al. is limited to a plant sterol nanoparticulate composition where 90% of the particle diameters are below 187 nm. The actual particle diameter distribution, however, is not presented. In one embodiment, the present invention contemplates that the technology described by Cooper et al. cannot produce a uniform particle diameter distribution ranging between 10 - 110 nm. See Example 14. Unlike some embodiments of the present invention, Cooper et al. has not considered methods to make a nanoparticulate composition that include a heating process. In fact, Cooper et al. presents a discussion concluding that preparing a plant sterol nanoparticulate composition using a process that includes heating is not desirable and problematic. Some embodiments of the present invention have solved those problems.
- emulsification The formation of a uniform mixture (i.e., for example, a population) of predominantly small particles may involve a physical process termed "emulsification".
- An emulsion is traditionally defined in the art “as a system ... consisting of a liquid dispersed with or without an emulsifier in an immiscible liquid usually in droplets of larger than colloidal size” Medline Plus Online Medical Dictionary, Merriam Webster (2005). Consequently, as the art developed emulsif ⁇ ers capable of generating smaller and smaller diameter particles, the terms "microemulsion” and “nanoemulsion” became known.
- a microemulsion is one thousand-fold greater in diameter than a nanoemulsion.
- the present invention contemplates a premix comprising a compound substantially soluble (i.e., for example, greater than 30 mg/ml) in a liquid dispersion medium (i.e., for example, a heated liquid dispersion medium) and, optionally, common emulsifying agents including, but not limited to, phospholipids, fatty acid monoglycerides, fatty acid diglycerides, or polysorbates.
- a nanoemulsion is created by exposing a premix to a continuous turbulent flow at a high pressure, wherein the pressure is at least 25,000 PSI.
- the high pressure turbulent flow comprises microfluidization.
- the nanoemulsion comprises particles encapsulating pharmaceuticals or nutraceuticals.
- the nanoemulsion comprises a uniform nanoemulsion having stable particles.
- the microfluidization comprises a single pass exposure (i.e., for example, approximately thirty (30) seconds), hi one embodiment, a uniform plant sterol micro fluidized nanoemulsion has an improved low density lipoprotein cholesterol lowering efficacy.
- Oral drug administration is a common method for providing pharmaceuticals and nutraceuticals to any subject.
- the contemplated methods of delivering a nanoemulsion is not limited to oral and include, for example, transdermal, intravenous, intraperitoneal, intramuscular, or subcutaneous routes of administration.
- Oral administration is favored because the formulations (i.e., liquids or suspensions) are relatively inexpensive to produce and are well tolerated. Subsequent gastrointestinal absorption of the formulation's ingredients, however, is not as predictable.
- the formulations must be compatible with the digestive system. Consequently, lipid-based drug delivery systems are known to be useful as carriers for many drug delivery systems.
- lipid composition i.e., for example, molecular size and charge
- pharmaceutical, nutraceutical, or cosmeceutical chemical structure i.e., molecular size and pH ionization
- iii the overall health of the subject.
- Lipids are generally categorized as physiologically non-absorbable or absorbable. It should be recognized that gastrointestinal absorption processes are unrelated to a compound's solubility properties.
- the present invention contemplates compositions and methods related to uniform microfluidized nanoemulsions comprising either absorbable or non-absorbable lipids thereby improving their bioavailability.
- Plant sterols, stands, and triterpene alcohols are either not absorbed, or poorly absorbed, into the bloodstream following oral administration.
- the present invention contemplates a method of making a uniform nanoemulsion (i.e., for example, microfluidized) comprising a nonabsorbable lipid having substantial solubility in a liquid dispersion medium and, optionally, common emulsifying agents, such as phospholipids, fatty acid monoglycerides, fatty acid diglycerides, or polysorbates to formulate improved nanoemulsions.
- the nanoemulsion comprises particle diameters ranging between 10 - 110 ran, thereby improving oral administration.
- plant sterols such as ⁇ -sitosterol
- ⁇ -sitosterol plant sterols
- the presence of unabsorbed plant sterols in the gastrointestinal system inhibits the normal metabolism of cholesterol and, concomitantly, decreases blood cholesterol levels.
- administration of twenty (20) gms of crystalline plant sterols can reduce plasma cholesterol levels approximately 10%.
- non-absorbable lipids are advantageous as a nutraceutical because of a lack of side effects.
- Side effects are routinely observed when using traditional pharmaceutical systemic cholesterol-lowering interventions (i.e., for example, HMG CoA reductase inhibitors or niacin).
- HMG CoA reductase inhibitors or niacin i.e., HMG CoA reductase inhibitors or niacin.
- plant sterols can be prescribed for the general population, including children for whom systemic interventions are rarely recommended. It is known that the consumption of adequate amounts of plant sterols will lower blood cholesterol levels.
- the present invention contemplates improvements in currently known methods to deliver plant sterols or stanols.
- the first known method involves dissolving the plant sterol in a vegetable oil- containing margarine to an efficacious level of plant sterol.
- a free stanol or a sterol is increased by: i) interesterified with a fatty acid such oleate or linoleate; ii) mixed in vegetable oil; or iii) hydrogenated to produce margarine, plasma cholesterol can be reduced by approximately 30%.
- this process can result in the consumption of up to approximately eighteen (18) grams of fat.
- Stahln et al. "Use of a stanol fatty acid ester for reducing serum cholesterol level" US Patent No.
- the present invention contemplates a method of making a beverage nanoemulsion that comprises plant sterols.
- the method to make the beverage nanoemulsion may comprise a continuous turbulent flow at a high pressure.
- the continuous turbulent high pressure flow comprises microfluidization.
- the nanoemulsion beverage comprises an orange juice product.
- the second known method comprises oral delivery of water-dispersible plant sterols (i.e., for example, a stanol not dissolved in fat) by incorporation micron-sized micelles (i.e., microemulsions having diameters of several thousand nanometers) which can be subsequently added to beverages or foods.
- micron-sized micelles i.e., microemulsions having diameters of several thousand nanometers
- Ostlund, Jr. "Sitostanol formulation to reduce cholesterol absorption and method for preparing and use of same" US Patent No. 5, 932,562 (1999)(herein incorporated by reference).
- cholesterol absorption was reduced by approximately 37%.
- the present invention contemplates a nanoemulsion technology comprising a specific formulation and a microfluidization process that provides particle diameters from between 10 - 110 nm.
- the nanoparticle has improved pH and temperature stability properties, thereby stabilizing the particle's integrity throughout the gastrointestinal system.
- the third known method involves the oral delivery of plant sterols by producing a water dispersible sterol product.
- These water dispersible products usually include emulsifying agents including, but not limited to, monoglycerides and polysorbates.
- the present invention contemplates a microfluidizing nanoemulsion technology (i.e., for example, that produced by a continuous flow high pressure process) that improves the emulsification of these water-dispersible plant sterols into nanoemulsions having a particle diameter of approximately 40-60 nm.
- any incorporated pharmaceutical, nutraceutical, or cosmeceutical has improved efficacy (i.e., for example, plasma cholesterol lowering by a plant sterol).
- a smaller-sized plant sterol-containing nanoparticles contemplated by one embodiment of the present invention when compared to known micron-sized micelles or microemulsions, has an improved disruption of the normal micellar delivery of dietary cholesterol to the digestive tract.
- This invention also relates to the use of nanoemulsions as an oral delivery vehicle for absorbable lipids including, but not limited to, fatty acids, carotenoids, tocopherols and other fat soluble vitamins, tocotrienols, and Coenzyme-Q.
- the present invention contemplates a method to make a uniform microfiuidized nanoemulsion comprising an absorbable lipid having substantial solubility in a liquid dispersion medium and, optionally, common emulsifying agents, such as phospholipids, fatty acid monoglycerides, fatty acid diglycerides, or polysorbates to formulate improved nanoemulsions.
- the method comprises a step exposing a premix to a continuous turbulent flow at high pressure.
- the pressure is at least 25,000 PSI.
- the nanoemulsion comprises carotenoids, including, but not limited to, lutein and zeaxanthin.
- the nanoemulsion comprises nanoparticles having a particle diameter ranging from 10 - 110 run, thereby improving bioavailability, hi one embodiment, nanoemulsion bioavailability is improved following oral, transdermal, intravenous, intraperitoneal, intramuscular or subcutaneous delivery.
- the present invention contemplates a method to treat or prevent macular degeneration (i.e., a major cause of blindness in people of 65) providing an improved nanoemulsion comprising at least one carotenoid.
- the carotenoid is selected from the group comprising lutein or zeaxanthin.
- lipid bioavailability i.e., for example, the percentage of the dose absorbed.
- Factors influencing bioavailability may include, but are not limited to, food processing methods, food matrix, and physiological solubility in naturally-occurring micelles (i.e., for example, the lipid micellular transport system).
- Fat-soluble nutrients can be incorporated into high fat-containing vegetable oils for dispersal into a fat matrix (i.e., for example a micron-sized micelle). The micelle solubilizes the lipid-soluble nutrient thereby allowing absorption by the small intestine.
- the present invention contemplates a nanoemulsion produced by a continuous turbulent flow at high pressure having improved pharmacokinetic properties when compared to conventional nanoparticulate compositions and/or nanoemulsions currently known in the art. It is known that nanoparticles deliver and/or release drugs (i.e., for example, norflaxin) and/or proteins (i.e., for example, serum albumin) more effectively than microparticles.
- drugs i.e., for example, norflaxin
- proteins i.e., for example, serum albumin
- One embodiment of the present invention contemplates a uniform microfluidized nanoemulsion having improved pharmacokinetic properties when compared to conventional nanoparticulate compositions and/or nanoemulsions currently known in the art.
- One advantage of uniform microfluidized nanoemulsions comprises a narrow particle diameter range (i.e., for example, 10 - 110 nm).
- Most conventional nanoparticle compositions and/or nanoemulsions currently known have a wide distribution of particle diameters that interfere with the improved efficacies and bioavailabilities of the smaller sized particles.
- the present invention has solved the problem of generating nanoemulsions with highly variable particle diameters and provides a more uniformly small-sized nanoemulsions (i.e., for example, a uniform nanoemulsion comprising stable particles). Consequently, these uniform nanoemulsions provide improved pharmacokinetic parameters when compared to conventional nanoparticle compositions and/or nanoemulsions currently known in the art independent of the mode of delivery which includes, but is not limited to, oral, transdermal, intravenous, intraperitoneal, intramuscular, subcutaneous, etc..
- A. Absorption Phase The use of conventional nanoparticulate compositions or nanoemulsions is not ideal due to delayed onset of action. In contrast, a uniform microfluidized nanoemulsion as contemplated by the present invention exhibits faster therapeutic effects.
- compositions and nutraceuticals are commercially available as tablets, liquids, gel caps, capsules etc., generally intended for oral administration. Peak plasma concentrations of these compositions usually occur between 2 - 4 hours following administration.
- peak plasma concentrations of an incorporated compound can be obtained in less than about 2 hours, preferably less than about 1 hour, more preferably less than about 30 minutes, but most preferably between 1 and 15 minutes.
- the recommended total daily dose of most pharmaceuticals and nutraceuticals are administered in divided doses. It is known in the art that a single daily dose may be preferable to multiple dose each day. For example, in studies of adults with partial onset seizures, a daily dose of 200 mg/day has inconsistent effects and is less effective than 400 mg/day. See Physicians' Desk Reference, 57.sup.th Edition, pp. 2502 (2003).
- some uniform micro fluidized nanoemulsions of the present invention may be administered less frequently, at lower doses, and in dosage forms such as liquid dispersions, powders, sprays, solid re-dispersible dosage forms, ointments, creams, etc.
- dosage forms such as liquid dispersions, powders, sprays, solid re-dispersible dosage forms, ointments, creams, etc.
- Exemplary types of formulations useful in the present invention include, but are not limited to, liquid dispersions, gels, aerosols (pulmonary and nasal), ointments, creams, solid dose forms, etc. of any pharmaceutical, nutraceutical, or cosmeceutical.
- Lower dosages can be used because the smaller particle diameters of embodiments of the present invention ensure more complete absorption.
- the present invention contemplates a therapeutically effective amount of a uniform microfluidized nanoemulsion having 1/6, 1/5, 1/4, 1/3, or 1/2 of the therapeutically effective amount of a conventional pharmaceutical, nutraceutical, or cosmeceutical formulations.
- a liquid dosage form of a conventional nanoparticulate or nanoemulsion composition would be expected to be a relatively large volume, highly viscous substance which would not be well accepted by subject populations. Moreover, viscous solutions can be problematic in parenteral administration because these solutions require a slow syringe push and can stick to tubing. In addition, conventional formulations of poorly water-soluble active agents tend to be unsafe for intravenous administration techniques, which are used primarily in conjunction with highly water-soluble substances. Embodiment contemplated by the present invention solves this problem by utilizing a liquid dispersion medium in which the pharmaceutical, nutraceutical, or cosmeceutical is substantially soluble.
- Liquid dosage forms of embodiments of a uniform microfluidized nanoemulsion provide significant advantages over a liquid dosage form of a conventional nanoparticulate or nanoemulsion.
- the uniform microfluidized nanoemulsion comprises a low viscosity.
- the uniform nanoemulsion comprises a silky texture.
- Liquid formulations of uniform nanoemulsions contemplated by the present invention are easier to consume which is especially important when considering juvenile subjects, terminally ill subjects, and elderly subjects. Viscous or gritty formulations, and those that require a relatively large dosage volume, are not well tolerated by these subject populations.
- Liquid oral dosage forms can be particularly preferably for subject populations who have difficulty consuming tablets, such as infants and the elderly.
- the viscosities of liquid dosage forms of nanoparticulate topiramate according to the invention are preferably less than about 1/200, less than about 1/175, less than about 1/150, less than about 1/125, less than about 1/100, less than about 1/75, less than about fraction 1/50, or less than about 1/25 of a liquid oral dosage form of a conventional nanoparticulate composition or nanoemulsion at about the same concentration per ml.
- the present invention contemplates a uniform microfluidized nanoemulsion that is not turbid.
- turbid refers to the property of particulate matter that can be seen with the naked eye or that which can be felt as "gritty" when consumed.
- Embodiments of nanoemulsions contemplated by the present invention can be poured out of or extracted from a container as easily as water, whereas a liquid dosage form of a conventional nanoparticulate or nanoemulsion composition is expected to exhibit notably more "sluggish" characteristics.
- the present invention contemplates a uniform microfluidized nanoemulsion having an increased bioavailability and a smaller dose requirement as compared to prior conventional nanoparticulate compositions and nanoemulsions administered at the same dose.
- Any pharmaceutical, nutraceutical, or cosmeceutical can have adverse side effects if administered at a specific dose for a specific duration.
- lower doses which can achieve the same or better therapeutic effects as those observed with larger doses are desired.
- Such lower doses may be realized with a uniform microfluidized nanoemulsion contemplated by the present invention due to greater bioavailability as compared to conventional nanoparticulate compositions and nanoemulsions; consequently smaller dose of pharmaceuticals and nutraceutical are likely required to obtain the desired therapeutic effect.
- the relative bioavailability of pharmaceutical, nutraceutical, or cosmeceutical incorporated into a conventional nanoparticulate or nanoemulsion may be about 85% (i.e., as compared to a pure solution).
- a uniform microfluidized nanoemulsion formulated into an oral pharmaceutical, nutraceutical, or cosmeceutical dosage form has a relative bioavailability preferably greater than about 85%.
- the relative bioavailability is greater than about 90%, or greater than about 95%, or greater than about 98%.
- the present invention also provides embodiments of uniform microfluidized nanoemulsions having incorporated pharmaceuticals and/or nutraceuticals having improved pharmacokinetic profiles when administered to mammalian subject.
- the improved profile is compared to conventional nanoparticulate compositions and nanoemulsions.
- an improved pharmacokinetic (pK) profile can have several different types of attributes.
- an improved pK profile of a uniform microfluidized nanoemulsion may produce the same pK profile as a conventional nanoparticulate composition or nanoemulsion, but at a lower dose.
- an improved pK profile requires less frequent dosing as compared to a conventional nanoparticulate composition or nanoemulsion.
- an improved pK profile shows a faster onset of activity and/or greater quantity of drug absorbed (i.e., greater bioavailability) than conventional nanoparticulate compositions and nanoemulsions.
- an improved pK profile allows a more effective and/or faster titration of the subject to therapeutic plasma levels.
- the present invention contemplates certain embodiments of uniform microfluidized nanoemulsions comprising an improved pharmacokinetic profile as reflected by time-to-maximum-concentration (T max ), maximum-concentration (C max ), and/or area-under-curve (AUC) profiles.
- an administered dose of a pharmaceutical, nutraceutical, or cosmeceutical incorporated into a uniform microfluidized nanoemulsion comprises a T max less than that of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- the T ma ⁇ is less than about 99%, less than about 90%, less than about 80%, less than about 70%, less than about 60%, less than about 50%, less than about 40%, less than about 30%, less than about 25%, less than about 20%, less than about 15%, or less than about 10% of the T ma ⁇ of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- an administered dose of a pharmaceutical, nutraceutical, or cosmeceutical incorporated into a uniform microfluidized nanoemulsion comprises,, a C max greater than that of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- the C max is greater than about 5%, greater than about 10%, greater than about 15%, greater than about 20%, greater than about 30%, greater than about 40%, greater than about 50%, greater than about 60%, greater than about 70%, greater than about 80%, greater than about 90%, greater than about 100%, greater than about 110%, greater than about 120%, greater than about 130%, greater than about 140%, or greater than about 150% than the C max of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- an administered dose of a pharmaceutical, nutraceutical, or cosmeceutical incorporated into a uniform microfluidized nanoemulsion comprises an AUC greater than that of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- the AUC is greater than about 5%, greater than about 10%, greater than about 15%, greater than about 20%, greater than about 30%, greater than about 40%, greater than about 50%, greater than about 60%, greater than about 70%, greater than about 80%, greater than about 90%, greater than about 100%, greater than about 110%, greater than about 120%, greater than about 130%, greater than about 140%, or greater than about 150% than the AUC of a conventional nanoparticulate composition and/or nanoemulsion, administered at the same dosage.
- the present invention contemplates a method of making a nanoemulsion having anti-bacterial properties.
- the method comprises a step exposing a premix to a continuous turbulent flow at high pressure.
- the antibacterial nanoemulsion is prepared by microfiuidization.
- the exposing comprises approximately thirty (30) seconds, hi another embodiment, the exposing comprises a pressure of at least 25,000 PSI. hi another embodiment, the antibacterial nanoemulsion comprises soy protein.
- a powdered soy protein preparation was added to water thus creating a suspension. Then, a first aliquot of the suspension was added to a first container (i.e., for example, a cell culture falcon flask) that served as a control. A second aliquot of the suspension was microfluidized ⁇ supra) Xo create a nanoemulsion. The preparation was microfluidized in accordance with Example 5. The microfluidized nanoemulsion was then added to a second container. Both containers were refrigerated immediately and observed over the next several days. The control suspensions agglomerated and grew bacteria. See Figures 15A and 15B. In contrast, the microfluidized nanoemulsion containing the soy protein did not agglomerate or grow bacteria. See Figures 15C and 15D.
- microfiuidization sterilized the bacteria. It is further believed that the microfiuidization shear stress resulted in a bacterial cell lysis thereby preventing further bacterial growth. Consequently, it is believed that microfiuidization, as contemplated herein, produces a microbiologically sterile composition.
- the present invention contemplates a nanoemulsion comprising an oxidizing environment produced by a method comprising a continuous turbulent flow at a high pressure.
- the nanoemulsion comprises a uniform microfluidized nanoemulsion.
- the oxidizing environment prevents bacterial growth, hi another embodiment, the oxidizing environment is bacteriocidal. In another embodiment, the oxidizing environment provides a sterile nanoemulsion.
- An oxidizing nanoemulsion environment may result from an increased surface to volume ratio.
- the present invention also contemplates a method to avoid the generation of an oxidizing environment by micro fluidizing in the presence of an antioxidant.
- the antioxidant reduces the presence of reactive oxygen species (ROS) in the micro fluidized nanoemulsion.
- the antioxid ants are encapsul ated by the nanopart icles for subsequ ent release to the subject.
- the ROS load within any nanoemulsion preparation can be quantitatively determined by measuring indicators of an oxidizing environment.
- Malondialdehyde (MDA) is a known indicator of an oxidizing environment.
- Example 1 Stable Formulation of Plant Sterol Microfluidized Nanoemulsions
- This example presents one plant sterol embodiment of a microfluidized nanoemulsion.
- the step-wise procedure is as follows:
- step 4 Add step 4 mixture to step 5 mixture, keep stir bar and heat on for 30 mins
- the mean particle diameter (i.e., Peak I/Peak 2) for these microfluidized plant sterol nanoemulsions was 39 nm. See Figure 1.
- the average particle diameter data for the plant sterol microfluidized nanoemulsion is shown in Table 2 below.
- Peak 3 0 0 0 Z- Average: 38.91; PDI: 0.228; Intercept: 0.9764. After three months the particle diameter was again determined.
- the mean particle diameter (i.e., Peak 1) for this microfluidized plant sterol nanoemulsion was 64.4 nm. See Figure IA.
- the average particle diameter data for the three month plant sterol nanoemulsion is shown in Table 3 below.
- Example 2 Stable Formulation of Cod Liver Oil Microfluidized Nanoemulsions This example presents one cod liver oil embodiment of a microfluidized nanoemulsion that has a stable particle diameter for at least four months.
- the step-wise procedure is as follows:
- the mean particle diameter (i.e., Peak I/Peak 2) for this cod liver oil microfluidized nanoemulsion was 58 nm. Before microfluidization, the mean particle diameter of the cod liver oil suspension was 2,842 nm. This represents a 50-fold reduction with a single pass through the microfluidizer. Four months after the microfluidization process, the particle diameter was again determined and found not to have changed. See Figure 2. The average particle diameter data from the four-month microfluidized sample is presented in Table 4. Table 4: Microfluidized Cod Liver Oil Nanoemulsion Four Months After Preparation
- This example presents one tocopherol embodiment of a microfluidized nanoemulsion that maintains particle diameter for at least five months.
- the step-wise procedure is as follows:
- step 3 mixture to step 2 mixture
- step 4 mixture to step 5 mixture, keep stir bar and heat on
- the mean particle diameter for the tocopherol microfluidized nanoemulsion was 64 nm. Before microfluidization, the mean particle diameter for the tocopherol suspension was 1,362 nm. This represents a 21-fold reduction a single pass through the microfluidizer. Five months after the microfluidization process, the particle diameter was again determined and found not to have changed. See Figure 3. The average particle diameter data from the five-month microfluidized sample is presented in Table 5. Table 5: Microfluidized Tocopherol Nanoemulsion Five Months After Preparation
- Example 4 Formulation of Lutein and Zeaxanthin Microfluidized Nanoemulsions This example presents one lutein/zeaxanthin embodiment of a microfluidized nanoemulsion.
- the step-wise procedure is as follows:
- the mean particle diameter (i.e., Peak I/Peak 2) for the lutein and zeaxanthin microfluidized nanoemulsion was 62 nm. See Figure 4.
- the average particle diameter data for the sample is shown in Table 6.
- This example presents one soy protein embodiment of a microfluidized nanoemulsion.
- the step-wise procedure is as follows:
- Example 6 Formulation of Whey Protein Micro fluidized Nanoemulsion This example presents one whey protein embodiment of a micro fluidized nanoemulsion.
- the step-wise procedure is as follows:
- the mean particle diameter (i.e., Peak I/Peak 2) for the whey protein microfluidized nanoemulsion was 108 nm. See Figure 6.
- the average particle diameter data for the sample is shown in Table 8.
- Example 7 Formulation of Orange Juice, Plant Sterol and Lutein Microfluidized Nanoemulsion
- This example presents one orange juice/plant sterol/lutein embodiment of a microfluidized nanoemulsion.
- the step-wise procedure is as follows:
- the mean particle diameter (i.e., Peak I/Peak 2) for the orange juice/plant sterol/lutein microfluidized nanoemulsion was 46 nm. See Figure 7.
- the average particle diameter data for the sample is shown in Table 9.
- This example presents one DHA fish oil/water embodiment of a microfluidized nanoemulsions that maintains particle diameter for at least two months.
- the step-wise procedure is as follows:
- the mean particle diameter (i.e., Peak 1) for the DHA fish oil/water microfluidized nanoemulsion was 73 nm. Two months after the micro fluidization process, the particle diameter was again determined and found not to have changed. See Figure 8. The average particle diameter data from the two-month microfluidized sample is presented in Table 10. Table 10: Stable Microfluidized DHA Fish Oil/Water Nanoemulsion
- Example 9 Stable Formulation of DHA Fish Oil/Milk Microfluidized Nanoemulsion This example presents one DNA fish oil/milk embodiment without any added emulsifiers that maintains particle diameter for at least three (3) weeks.
- the step-wise procedure is as follows:
- Example 10 Temperature Stability Of Microfluidized Nanoemulsions This example presents the stability of microfluidized nanoemulsions following exposure to either heat or cold.
- the formulation used in this experiment comprised DHA Fish Oil milk/tocopherol.
- the mean particle diameter (i.e., Peak 1) for the DHA fish oil/milk/tocopherol microfluidized nanoemulsion was 87 nm. See Figure 10. This nano-emulsion preparation was made without any added emulsifiers. The average particle diameter data for the original nanoemulsion is presented in Table 12.
- the original microfluidized nanoemulsion was freeze-thaw tested at - 4°C for 24 hours. Twenty-four hours later, the oil was still in solution and the particle diameter was stable as compared to the original nanoemulsion. See Figure 12.
- the average particle diameter data for the freeze-thaw microfluidized nanoemulsion is presented in Table 14.
- Example 11 unproved Bioavailability Of Dietary Lvcopene This example demonstrates an improved bioavailability of lycopene when fed as a uniform microfluidized nanoemulsion versus mixed into a standard diet formulation.
- the lycopene microfluidized nanoemulsion was prepared in a step-wise manner as follows:
- the mean particle diameter for the lycopene microfluidized nanoemulsion was 74 nm.
- the microfluidized nanoemulsion was incorporated into a chow-based diet and fed to gerbils over a 4 week period.
- a control group was fed a lycopene in oil-enriched chow-based diet.
- blood was collected, plasma harvested and plasma lycopene levels were determined by HPLC in both gerbil groups.
- Figure 13 demonstrates that control gerbils did not demonstrate detectable plasma lycopene levels.
- Example 12 Improved Efficacy Of Microfluidized Nanoemulsions This example presenting data showing that microfluidized nanoemulsions provide improved efficacy over that seen in traditional nanoemulsions. Specifically, this example compares the ability of three plant sterol formulations to reduce plasma low density lipoprotein cholesterol (LDL-C) levels in hypercholesterolemic hamsters.
- LDL-C low density lipoprotein cholesterol
- a microfluidized mixed plant sterol (60% sitosterol) nanoemulsion was prepared in a step-wise manner as follows:
- Step 8 Add Step 8 to Step 7. Stir and heat 20 min (80 0 C).
- the mean particle diameter for the microfluidized plant sterol nanoemulsion was
- Group 1 was fed a control hypercholesterolemic diet (HCD);
- Group 2 was fed 30 mg/d of crystalline plant sterol;
- Group 3 was fed 20 mg/d of MinuteMaid Heartwise ® micronized plant sterol (Cargill);
- Group 4 was fed 10 mg/d of the microfluidized plant sterol nanoemulsion.
- blood samples were analyzed for plasma LDL-C levels.
- the microfluidized plant sterol nanoemulsion was twice as effective as the MinuteMaid Heartwise ® micronized diet, and three times as effective as the crystalline plant sterol diet. See Figure 17.
- Example 11 results in improved clinical therapy when compared to micron-sized or crystalline plant sterol diets.
- Example 13 Cholesterol Nanoemulsions: Insoluble vs Soluble Dispersion Media
- This example presents data demonstrating that uniform microfluidized nanoemulsion compositions depend upon a compound having substantial solubility in the liquid dispersion medium.
- This example compares the micro fluidizing technique described in US Pat. No. 5,510,118 to one embodiment as contemplated by the present invention.
- the absorbable lipid cholesterol was chosen as the test compound.
- Group I represents the '118 premix and was prepared by dispersing cholesterol (2 gms), water (100 mis) and Tween ® 80 (0.2 gms), where cholesterol is insoluble (i.e., below at least 30 mg/ml) in the liquid dispersion medium (water). Thereafter, this cholesterol/water/Tween ® 80 solution was microfluidized using a M-100EH unit. Multiple passes (10-15) through the microfluidizer were performed at PSFs ranging between 4,000 - 20,000 but were terminated because the generated heat exceeded 70° C (much higher than the recommended 30-40° C in the ' 118 patent. After the micro fluidization it was observed that much of the cholesterol had precipitated. After twenty-four hours, the preparation of the Group I nanoemulsion contained only 0.44 gms (i.e., 22%) of the original cholesterol weight.
- Group II represents one embodiment of the present invention and was prepared by dispersing cholesterol (2 gms) in heated soybean oil (10 gms), soy lecithin (5 gms), and Tween 80 (0.2 gms) where cholesterol is substantially soluble (i.e., above at least 30 mg/ml) in the dispersion medium (oil). Thereafter, this cholesterol/oil/lecithin/Tween ® 80 was added to 100 ml of heated water and microfluidized using a single 30 second pass at 25,000 PSI using a M-100EH unit. After the microfluidization cholesterol precipitation was not noticeably evident.
- the preparation of the Group II nanoemulsion contained 1.66 gm (i.e., 83%) of the original cholesterol weight.
- the data show that the particle diameter distributions from both Group I and Group II premix preparations are practically identical. See Figure 18A and Figure 18B, respectively. Specifically, a single peak ranging from 700 - 1000 run having a mean particle diameter of approximately 900 nm is observed for both preparations. See Tables 15 and 16.
- Group I shows two vastly disparate and distinct peaks. See Table 17.
- Group II shows a single peak representing one embodiment of a uniform microfluidized nanoemulsion. See Table 18.
- Example 14 Nanoparticulate Compositions vs Uniform Microfluidized Nanoemulsions
- a milled nanoparticle composition for example, one made according to US Appln PublNo. 2004/0033202 to Cooper et al.
- An absorbable phytosterol will be chosen as the test compound.
- Group I represents the '202 premix that will be prepared by dispersing 5% (w/w) phytosterol/water solution with 1% (w/w) Tween ® 80, where the phytocholesterol is insoluble (i.e., below at least 30 mg/ml) in the liquid dispersion medium (water). Thereafter, this phytosterol/water/Tween ® 80 solution will be milled at 1O 0 C for 1.5 to 2 hours in a DYN0 ® -Mill KDL (Willy A Bachofen AG, Machinefabrik, Basel ,
- Group II represents one embodiment of the present invention and will be prepared by dispersing 5% (w/w) phytosterol/ heated soybean oil solution, soy lecithin, with 1% Tween ® 80, where the phytosterol is substantially soluble (i.e., above at least 30 mg/ml) in the liquid dispersion medium (oil).
- this phytosterol/oil/lecithin/Tween ® 80 premix is added to 100 ml heated water and microfluidized using a single 30 second pass at 25,000 PSI using a M-100EH unit. After the microfluidization phytosterol precipitation will not be noticeably evident. After twenty- four hours, the preparation of the Group II nanoemulsion will contain greater than 3/4 of the original phytosterol weight. The data will show that the particle diameter distributions from both Group I and
- Group II premix preparations are practically identical. For example, a single peak ranging from 700 - 1000 nm having a mean particle diameter of approximately 900 nm might be observed for both preparations. See Tables 19 and 20.
- Group I will most likely show at least two vastly disparate and distinct peaks. See Table 21.
- Group II will have only a single peak representing one embodiment of a uniform micro fluidized nanoemulsion. See Table 22.
- Example 15 Improved Bioavailability Over Conventional Nanoparticulate Compositions This example will provide data showing that a uniform microfluidized nanoemulsion as contemplated by one embodiment of the present invention has improved plant sterol bioavailability and/or efficacy than a conventional nanoparticulate composition.
- a standard curve will be constructed by gavaging thirty (30) hamsters with 1 ⁇ Ci
- 3 H-cholesterol Plasma cholesterol levels are then determined at Day 1, Day 2, Day 4, and Day 7. These data are used to calculate bioavailability of 3 H-cholesterol during the 7
- Group I Standard diet mixed with a plant sterol.
- Group II Standard diet mixed with a uniform microfluidized plant sterol nanoemulsion prepared in accordance with Example 1.
- Group III Standard diet mixed with a conventional lycopene nanoparticulate composition prepared in accordance with conventional milling grinder techniques as described in the '202 Cooper et al. application.
- the AUC measurement will determine the ability of each preparation to reduce the absorption of 3 H-cholesterol into the bloodstream which is proportional to the bioavailability and/or efficacy of each preparation.
- a greater bioavailability and/or efficacy of a plant sterol when administered as a uniform microfluidized nanoemulsion will be seen because: i) the average particle diameter of the uniform microfluidized nanoemulsion is smaller than the conventional nanoparticulate composition (i.e., for example, 300 nm v.
- microfluidization produces more stable particles than either milling or homogenization; and iii) microfluidization produces pH-resistant particles (i.e., stomach acid or small intestine base conditions) unlike those produced by either milling or homogenization.
- This example will provide data showing that a uniform microfluidized nanoemulsion as contemplated by one embodiment of the present invention has improved efficacy in lowering plasma cholesterol levels that a conventional nanoparticulate composition.
- a nanoparticulate composition i.e., for example, prepared as per the '202 Cooper et al. application
- a uniform microfluidized nanoemulsion as contemplated by one embodiment of the present invention, for four (4) additional weeks.
- Group II Hypercholesterolemic diet + 0.1% (w/w) plant sterol nanoparticulate composition.
- Group III Hypercholesterolemic diet + 0.5% (w/w) plant sterol nanoparticulate composition.
- Group IV Hypercholesterolemia diet + 1% (w/w) plant sterol nanoparticulate composition.
- Group V Hypercholesterolemic diet + 0.1% (w/w) plant sterol uniform microfluidized nanoemulsion.
- Group VI Hypercholesterolemic diet + 0.5% (w/w) plant sterol uniform microfluidized nanoemulsion.
- Group VII Hypercholesterolemic diet + 1% (w/w) plant sterol uniform microfluidized nanoemulsion.
- Plasma samples are taken at 0, 2, 3, 4, 5, and 6 weeks where plasma cholesterol levels will be determined by methods known in the art.
- a greater efficacy of the plant sterol uniform microfluidized nanoemulsions to lower plasma cholesterol levels is seen because: i) the average particle diameter of the uniform microfluidized nanoemulsion is smaller than the conventional nanoparticulate composition (i.e., for example, 300 nm v. 50 ran); ii) microfluidization produces more stable particles than either milling or homogenization; and iii) microfluidization produces pH-resistant particles (i.e., stomach acid or small intestine base conditions) unlike those produced by either milling or homogenization.
- This example provides data showing that the Bosch technique does not produce a uniform microfluidized nanoemulsion when compared to one embodiment of the present invention under identical microfluidization techniques.
- the Group I & II premixes were prepared in accordance with Example 13. Each premix was subjected to one pass at 25,000 PSI in the microfluidizer.
Abstract
Description
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JP2008526014A JP5368793B2 (en) | 2005-07-18 | 2006-07-11 | Compositions and methods for making and using nanoemulsions |
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CN2006800342591A CN101384247B (en) | 2005-07-18 | 2006-07-11 | Compositions and methods for making and using nanoemulsions |
EP06851414A EP1919447A4 (en) | 2005-07-18 | 2006-07-11 | Compositions and methods for making and using nanoemulsions |
CA2618655A CA2618655C (en) | 2005-07-18 | 2006-07-11 | Compositions and methods for making and using nanoemulsions |
US11/996,016 US20080274195A1 (en) | 2005-07-18 | 2006-07-11 | Compositions and Methods for Making and Using Nanoemulsions |
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AU2006346369A AU2006346369B2 (en) | 2005-07-18 | 2006-07-11 | Compositions and methods for making and using nanoemulsions |
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IL188666A IL188666A (en) | 2005-07-18 | 2008-01-08 | Methods for making and using nanoemulsions comprising a population of nanoparticles using a device capable of creating a continuous turbulent flow under high pressure |
US14/594,417 US10016364B2 (en) | 2005-07-18 | 2015-01-12 | Compositions and methods for making and using nanoemulsions |
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Also Published As
Publication number | Publication date |
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AU2006346369A1 (en) | 2008-01-24 |
IL243260A0 (en) | 2016-02-29 |
KR101430767B1 (en) | 2014-08-19 |
EP1919447A2 (en) | 2008-05-14 |
CA2618655A1 (en) | 2008-01-24 |
BRPI0613631A2 (en) | 2011-01-18 |
CN101384247A (en) | 2009-03-11 |
US10016364B2 (en) | 2018-07-10 |
BRPI0613631A8 (en) | 2017-12-26 |
CA2618655C (en) | 2015-12-22 |
US20150335574A1 (en) | 2015-11-26 |
KR20130079645A (en) | 2013-07-10 |
IL188666A0 (en) | 2011-08-01 |
WO2008010788A3 (en) | 2008-10-23 |
CN101384247B (en) | 2013-05-22 |
WO2008010788A9 (en) | 2008-03-06 |
CN103315954A (en) | 2013-09-25 |
KR20080058326A (en) | 2008-06-25 |
AU2006346369B2 (en) | 2013-02-21 |
JP2009501802A (en) | 2009-01-22 |
JP5368793B2 (en) | 2013-12-18 |
IL188666A (en) | 2016-03-31 |
US20080274195A1 (en) | 2008-11-06 |
EP1919447A4 (en) | 2012-10-31 |
JP2013028615A (en) | 2013-02-07 |
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